ELECTRICAL ENERGY

MEANING

Electrical energy is the most widely used form of energy in industrialised societies for two reasons:

• its capacity to de easily transformed into other forms of energy
• the posibility of transporting it long distances at a low cost

GENERATION

Electricity is porducded at an electrical power plants that use an external source of energy to produce electricity. To do this, they rely on a turbine-alternator system.

• The turbine converts mechanical energy into te rotating movement of a shaft
• The alternator is connected to the turbine shaft. As the shaft moves, it produces alternating electrical current.

       Once electricity is generated, it must be transported to towns, cities or industrial parks.

STORAGE

Electric energy storage (EES) uses forms of energy such as chemical, kinetic or potential energy to store energy that will later be converted to elctricity.

TRANSPORTATION

The transportation of electrical energy involves several proceses: raising the voltage to 220 000 V or 400 000 V, transporting it by high voltage  at electricity  substations until it reaches 3-30 kV and distributing it to the consumption centres